.container {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.box{
    width: 49%;
    height: 400px;
    margin-bottom: 20px;
}
.header {
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #CCCCCC;
    padding: 0 20px;
    font-size: 12px;
}